The effect of hydrogen bonding on the lower critical solution temperature of a polymer mixture

1985 ◽  
Vol 18 (11) ◽  
pp. 2326-2327 ◽  
Author(s):  
T. K. Kwei ◽  
E. M. Pearce ◽  
B. Y. Min
Keyword(s):  
Hydrogen Bonding ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Polymer Mixture ◽  
Critical Solution Temperature

scholarly journals Thermo-Tunable Pores and Antibiotic Gating Properties of Bovine Skin Gelatin Gels Prepared with Poly(n-isopropylacrylamide) Network

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2156
Author(s):  
Fang-Chang Tsai ◽  
Chih-Feng Huang ◽  
Chi-Jung Chang ◽  
Chien-Hsing Lu ◽  
Jem-Kun Chen
Keyword(s):  
Hydrogen Bonding ◽  
Incubation Time ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
E Coli ◽  
Polystyrene Nanospheres ◽  
Gelatin Gels ◽  
Bacteria Inhibition ◽  
Tunable Pores

Polystyrene nanospheres (PNs) were embedded in bovine skin gelatin gels with a poly(N-isopropylacrylamide) (PNIPAAm) network, which were denoted as NGHHs, to generate thermoresponsive behavior. When 265 nm PNs were exploited to generate the pores, bovine skin gelatin extended to completely occupy the pores left by PNs below the lower critical solution temperature (LCST), forming a pore-less structure. Contrarily, above the LCST, the collapse of hydrogen bonding between bovine skin gelatin and PNIPAAm occurred, resulting in pores in the NGHH. The behavior of pore closing and opening below and above the LCST, respectively, indicates the excellent drug gating efficiency. Amoxicillin (AMX) was loaded into the NGHHs as smart antibiotic gating due to the pore closing and opening behavior. Accordingly, E. coli. and S. aureus were exploited to test the bacteria inhibition ratio (BIR) of the AMX-loaded NGHHs. BIRs of NGHH without pores were 48% to 46.7% at 25 and 37 °C, respectively, for E. coli during 12 h of incubation time. The BIRs of nanoporous NGHH could be enhanced from 61.5% to 90.4% providing a smart antibiotic gate of bovine skin gelatin gels against inflammation from infection or injury inflammation.

Selective Hydrogen Bonding Controls Temperature Response of Layer-by-Layer Upper Critical Solution Temperature Micellar Assemblies

Soft Matter ◽  
2021 ◽  
Author(s):  
Aliaksei Aliakseyeu ◽  
Victoria Albright ◽  
Danielle Yarbrough ◽  
Samantha Hernandez ◽  
Qing Zhou ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Methacrylic Acid ◽  
Temperature Response ◽  
Solution Temperature ◽  
Layer By Layer ◽  
Critical Solution Temperature ◽  
Hydrogen Bonding Interactions ◽  
Upper Critical Solution Temperature ◽  
Lbl Films

This work establishes a correlation between the selectivity of hydrogen-bonding interactions and the functionality of micelle-containing layer-by-layer (LbL) assemblies. Specifically, we explore LbL films formed by assembly of poly(methacrylic acid)...

A polyelectrolyte-containing copolymer with a gas-switchable lower critical solution temperature-type phase transition

2019 ◽  
Vol 10 (2) ◽  
pp. 260-266 ◽  
Author(s):  
Jin-Jin Li ◽  
Yin-Ning Zhou ◽  
Zheng-Hong Luo ◽  
Shiping Zhu
Keyword(s):  
Phase Transition ◽  
Cloud Point ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Type Phase

A polyelectrolyte-containing copolymer with a CO2/N2-switchable cloud point, resulting from the gas-induced alternation of hydrophilicity, was prepared.

Heat transfer by unstable solution having the lower critical solution temperature

2022 ◽  
Vol 184 ◽  
pp. 122290
Author(s):  
P.V. Skripov ◽  
A.A. Igolnikov ◽  
S.B. Rutin ◽  
A.V. Melkikh
Keyword(s):  
Heat Transfer ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Unstable Solution ◽  
Critical Solution Temperature
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